Expansion-tank.



F. C. SMITH.

EXPANSION TANK.

APPLICATION FILED NOV. 24. 1914.

1,149,865. Patented Aug. 10, 1915.

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; EXPANSION-TANK.

- At' ncaaa filed ivovenbe zaieii. s'riaiuo. 873,760.

To all' w/mmit may concern: I e I Be it knownythat I, 'FRANK C. SMITH,citizen of the United States, resident of Minneapolis,county ofHennepin, State of lilinnesota, have invented certain new and usefulImprovements inj Expansion-Tanks, of which the following is aspecification. My invention relates to expansion tanks designedparticularly for use in connection with hot water heating systems.

It often happens in mounting an expansion tank that if a certainunchangeable opening is provided in the tank'forthe water supply pipeand another unchangeable opening for the waste or overflow'pipe, theplum- 'ber or mechanic making the connection is obliged to spendconsiderable time in adjusting the supply and overflow pipes to meetthese openings, it often being necessary to bend or twist the pipes pastone another,

necessitating frequently the use of elbows, Furthermore, the usualconnection in the bottom of. the tank for these pipes requires the useof unions in making the necessary attachments and adds considerably tothe expense of installlng the tank. I The object, therefore, of myinvention is to provide an expansion tank to[ which the supply andoverflow pipes can be connected,

without the use of unions and without the necessity of connecting eachpipe to an opening previously designed or equipped for such connection.

The invention consists generally in various constructions andcombinations, all as described and particularly pointed out in theclaims. 7

In the accompanyingdrawings forming part of this specification, Figure 1is a front elevation of an expansion tank embodying my invention, Fig. 2is a vertical sectional view, showing the interchangeable form ofconnections between the supply and overflow pipes and the bottom of thetank.

In the drawing, 2 represents a sheet metal expansion tank of ordinaryconstruction, having a bottom 3. This bottom is provided with holes 4and5. 6 and 7 are supply and overflow pipes, each pipe being adapted tofit loosely into either one of the holes 4 and 5. Oftentimeswhen thetank is set up in a corner of a closet, of some confined space in thebuilding, considerable time and labor are required to bring the supplyand over- Specification of ietters Patent.

imenaaAag. 10, 1915.

flow pipes around' to the point beneath the tank where they can beconveniently connec'ted' theretoif a certainconnection isflprfovided inthebottOm-of the tankffor each pipe; thetankhas been setup and the pipesbrought up througlrthe floonfthe plumber or heating man, may find thatthe supply pipe is on the right hand, while: the connection for it tothe tankis on the left,

7 necessitating the bending of the pipes past one another to enable theproper connections to be made; Then, too, the bottoms of these tanksarev usuallyprovided with plates as.

tened over the openings and threaded to receive the threaded ends of thepipes, neces srtatmg, of course, the use of unions in the pipesimmediately below the tank. I To Obviate these objections, I provideopenings receive either pipe, according to its location in the bottom ofthe tank adapted to loosely j with respect torthe holes in the tank,"and 7 when these pipes have been inserted into the out the use of unionsor similar connections.

The overflow pipe 7 preferably extends a greater distance into the tankthan the supply pipe and a sleeve 10 is mounted thereon, beinginteriorly threaded to engage the threads of the pipe, the threadedopening in the lower end of the sleeve beingpreferably of greaterdiameter than the continuation of the opening in the upper part of thesleeve, so that the inner wallof the waste pipe and the wall of thesleeve at the upper end thereof will be substantially flush with v oneanother, to avoid obstructing the pipe,

as indicated in Fig. 2. A gasket 11 is interposed between this sleeveand the bottom of the tank and when the sleeve is tightened,

a firm connection will be made between the waste pipe and the tankbottom. The usual sheet metal overflow 12 is mounted on the sleeve 10and projects up into the tank the desired distance to carry away thewater when it rises above a. predetermined point in the tank. Thisoverflow is shown on the left hand side'ofi the tankybut if for anyreason it should bepreferable to connect the waste pipe to the openingin the right'hand waste pipes having'threaded ends projecting. looselythrough said openings into 7 the tank and eachhaving'a locking memberfor said threaded ends'on the inside and outside of thetank' andseatedagainst opposite sides of thej'bottom thereof, an overflow pipemounted on the inner locking member of said waste pipe, said supply andWaste pipes being interchangeable in said openingsfor Copies otthispatent may be obtained for conveniene in making the connections to 52ndtank.

2. An expansion tank having two holes in the bottom, a water supply pipeand a waste pipe having threaded ends fitting loosely within said holesand projecting into said tank, a lock nut and gasket mounted on eachpipe below said bottom, a lock nut and gasket on said supply pipe abovesaid bottom, and an overflow pipe having a threaded base to engage theprojecting end of said waste pipe and inner side of the saidbottom, thetightening of said lock nuts and base clamping said pipes on the bottomof said tank. 4

In witness whereof, I have hereunto set my hand this 21st day ofNovember 1914-.

' FRANK C. SMITH.

Witnesses; v

GENEVIEVE SoR sEN, EDWARD A. PAUL.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G."

